Fix strange think usage

dotfiles/gittum/bin/sibling

@@ -75,5 +75,7 @@ popd >/dev/null
 
 test -n "$new_remote" || die "no such remote at sibling: $new_remote at $sibling"
 
-think \'git clone $new_remote\'
-git clone "$new_remote"
+cmd="git clone $new_remote"
+
+think "cmd='$cmd'"
+$cmd